253953507843 has 48 divisors (see below), whose sum is σ = 442338374400. Its totient is φ = 137151766080.

The previous prime is 253953507839. The next prime is 253953507883. The reversal of 253953507843 is 348705359352.

253953507843 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 53 + 507 + 84 + 3 = 666.

It is a Cunningham number, because it is equal to 503938²-1.

It is not a de Polignac number, because 253953507843 - 2² = 253953507839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253953507843.

It is not an unprimeable number, because it can be changed into a prime (253953507823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251968 + ... + 755906.

It is an arithmetic number, because the mean of its divisors is an integer number (9215382800).

Almost surely, 2^253953507843 is an apocalyptic number.

253953507843 is a deficient number, since it is larger than the sum of its proper divisors (188384866557).

253953507843 is a wasteful number, since it uses less digits than its factorization.

253953507843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504392 (or 504389 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 253953507843 in words is "two hundred fifty-three billion, nine hundred fifty-three million, five hundred seven thousand, eight hundred forty-three".